Is the paper "Reducing the Dimensionality of Data with Neural Networks" by Hinton relevant?
No; there are too many publications around for anybody to keep track of everything, so unless it is a seminal paper, you cannot draw any conclusions from this. They could simply have missed it.

Especially if it is a textbook for beginners, more advanced papers are often not mentioned, as they might be too complex to understand.

So you have to decide for yourself if that paper is relevant to you. To me it sounds like a specific application of neural networks; if the dimensionality of the input data is an issue for you, it might be, otherwise probably not.